Try this delicious bar recipe that combines the vibrant flavors of sour cream and raisins to create a luscious, moist bar! This bar is made with a crust of flour and oatmeal and is covered with a rich filling that is made with cooked raisins and thickened before adding to the crust and baking the bars. This recipe is one that your family is sure to enjoy and it makes the perfect after-school snack when served up with a cold glass of milk!